import { ref } from 'vue'
import { useAppStore } from '@/stores/app'
import { request, apiUrl, authHeaders } from '@/api/client'

const documents = ref([])
const loading = ref(false)
const error = ref('')

export function useDocuments() {
  const store = useAppStore()

  async function loadDocuments({ cateBizId = '' } = {}) {
    if (!store.token) {
      documents.value = []
      return
    }
    loading.value = true
    error.value = ''
    try {
      const params = new URLSearchParams({ page: '1', page_size: '100' })
      if (cateBizId) params.set('cate_biz_id', cateBizId)
      const result = await request(`/api/documents/adp?${params.toString()}`)
      documents.value = result.list || []
    } catch (err) {
      error.value = err.message
      documents.value = []
    } finally {
      loading.value = false
    }
  }

  async function uploadDocument({ file, tags, secrecyLevel, ownerDept = '财务部' }) {
    if (!file) throw new Error('请先选择或拖拽一个文件')
    const formData = new FormData()
    formData.append('file', file)
    formData.append('tags', (tags || []).join(','))
    formData.append('secrecy_level', secrecyLevel)
    formData.append('owner_dept', ownerDept)
    const response = await fetch(apiUrl('/api/documents/upload'), {
      method: 'POST',
      headers: authHeaders(),
      body: formData,
    })
    if (!response.ok) {
      throw new Error(await response.text())
    }
    return response.json().catch(() => null)
  }

  async function uploadToAdp({ file }) {
    if (!file) throw new Error('请先选择或拖拽一个文件')
    const formData = new FormData()
    formData.append('file', file)
    const response = await fetch(apiUrl('/api/documents/adp/upload'), {
      method: 'POST',
      headers: authHeaders(),
      body: formData,
    })
    if (!response.ok) {
      throw new Error(await response.text())
    }
    return response.json().catch(() => null)
  }

  async function deleteAdpDocument(docBizId) {
    if (!docBizId) throw new Error('缺少 DocBizId')
    return request(`/api/documents/adp/${encodeURIComponent(docBizId)}`, { method: 'DELETE' })
  }

  return { documents, loading, error, loadDocuments, uploadDocument, uploadToAdp, deleteAdpDocument }
}